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Leya [2.2K]
4 years ago
12

Deb is planning to paint a wall of her house that has two regular hexagonal windows. Painting the wall costs $1.75 per square fo

ot. How much will she have to spend to paint the wall? Round the answer to the nearest dollar.
Physics
1 answer:
azamat4 years ago
6 0

Answer:

It will cost Deb $4,025

Explanation:

The average square feet of a room in United States is 2,300square feet.

I square foot cost $1.75

Therefore 2,300square feet will cost:

2,300 square feet × $1.75 = $4,025

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A 9.76-m ladder with a mass of 22.6 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upw
galben [10]

Answer:

Part a)

\tau_{net} = 1397.1 Nm

Part b)

I = 702.06 kg m^2

Explanation:

Part a)

Torque on the rod is due to two forces

(i) Due to weight of the rod at mid point

(ii) Due to external force applied at the end

Now we have

\tau_{net} = FL - mg\frac{L}{2}

\tau_{net} = 254(9.76) - (22.6)(9.81)(\frac{9.76}{2})

\tau_{net} = 1397.1 Nm

Part b)

As per Newton's law we know that

\tau = I\alpha

now we have

1397.1 Nm = I(1.99 rad/s^2)

I = 702.06 kg m^2

6 0
3 years ago
Answer each question yes or no. Assume the motions and currents mentioned are along the x axis and fields are in the y direction
Sergeeva-Olga [200]

(a)  Does an electric field exert a force on a stationary charged object? YES ( F = Eq)

(b)  Does a magnetic field do so?- NO ( F= qvB)  

(c)   Does an electric field exert a force on a moving charged object? YES

(d) Does a magnetic field do so? YES ( F = qvB)  

(e) Does an electric field exert a force on a straight current-carrying wire? (  NO)

(f) Does a magnetic field do so? Yes

(g) Does an electric field exert a force on a beam of moving electrons?          Yes  

(h) Does a magnetic field do so?    YeS

To know more about magnetic field    visit : brainly.com/question/10353944

#SPJ4

6 0
2 years ago
Sound is heard louder in newly furnished room ,why?​
garik1379 [7]
A newly furnished room is likely to be more sparsely furnished, as clutter has yet to be introduced to the space. This means there will be more hard surfaces from which sound can bounce. This creates a noisier environment. The addition of throws, drapes, cushions, even tapestries will reduce reverberation.
6 0
3 years ago
Read 2 more answers
While tuning a string to the note C at 523 Hz, a piano tuner hears 2.00 beats/s between a reference oscillator and the string.
lara31 [8.8K]

Answer:

a)the possible frequencies are 521hz ,522hz, 523, 524hz,525hz

b) 526hz

c)0.989 or a 1.14% decrease in tension

Explanation:

a) While tuning a string at 523 Hz,piano tuner hears 2.00 beats/s between a reference oscillator and the string.

The possible frequencies of the string can be calculated by

fl=f' - B

where

fl= lower limit of the possible frequency

f'= frequency of the string

B= beat heard by the tuner

fl= 523hz + Or - (2beats/secs * 1hz/1beat per sc)

fl= 521hz or 525hz

So the possible frequencies are 521hz ,522hz, 523, 524hz,525hz

b)fl=f' - B

523hz= f' - 3

f'= 523 + 3= 526hz

c) The tension is directly proportional to the square of the frequencies

T1/T2 =f1^2/f2^2

523^2 / 526^2 = 0.989 or a 1.14% decrease in tensio

6 0
3 years ago
Solve this question and give to a detailed step-by-step process as to how you got the answer. Thanks in advance!
m_a_m_a [10]

Answer:

(A)

Explanation:

P1 = MVcos 30

P2 = MVcos 30

️P = -2 mvcos 30

️P = - square root of 3 mv

f1 = 2mv/ ️t

force on the wall = 2

f2 = square root of 3mv/ ️t, so f1 > f2

6 0
3 years ago
Read 2 more answers
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